Hmm, this is kinda cute...
Silent PC Review has a computer in a bread box! =) Very creative.

A new project article at SPCR: The marriage of a VIA EPIA 5000 Mini-ITX
based system and a translucent blue plastic breadbox from IKEA results in a
small desktop PC that looks like a cousin to the iMac. Naturally it is extremely
quiet, having only one fan running at 4.3V (in the Flex-ATX Seasonic PSU) and
a single platter Seagate Barracuda IV suspended with elastic.